BS EN ISO 4628-4:2016

This standard BS EN ISO 4628-4:2016 Paints and varnishes. Evaluation of degradation of coatings. Designation of quantity and size of defects, and of intensity of uniform changes in appearance is classified in these ICS categories:

• 87.040 Paints and varnishes

This part of ISO 4628 specifies a method for assessing the degree of cracking of coatings by comparison with pictorial standards.

ISO 4628‑1 defines the system used for designating the quantity and size of defects and the intensity of changes in appearance of coatings and outlines the general principles of the system. This system is intended to be used, in particular, for defects caused by ageing and weathering, and for uniform changes such as colour changes, for example yellowing.